diff --git a/easytier/src/dns/client.rs b/easytier/src/dns/client.rs
index ece4bed3..c996da87 100644
--- a/easytier/src/dns/client.rs
+++ b/easytier/src/dns/client.rs
@@ -61,7 +61,7 @@ impl DnsClient {
         rpc: &mut StandAloneClient<TcpTunnelConnector>,
         heartbeat: &mut HeartbeatRequest,
     ) -> anyhow::Result<()> {
-        let request = if heartbeat.snapshot.is_none() || self.mgr.dirty.peers.reset() {
+        let request = if heartbeat.snapshot.is_none() || self.mgr.dirty.reset() {
             heartbeat.update(self.mgr.snapshot());
             heartbeat.clone()
         } else {
diff --git a/easytier/src/dns/peer_mgr.rs b/easytier/src/dns/peer_mgr.rs
index 3af82c52..2bb3b6eb 100644
--- a/easytier/src/dns/peer_mgr.rs
+++ b/easytier/src/dns/peer_mgr.rs
@@ -39,15 +39,10 @@ impl TryFrom<DnsExportConfig> for DnsPeerInfo {
 
 const DNS_PEER_TTL: Duration = Duration::from_secs(3);
 
-#[derive(Debug, Default)]
-pub struct DnsPeerMgrDirtyFlags {
-    pub(crate) peers: DirtyFlag,
-}
-
 #[derive(Debug, Deref)]
 pub struct DnsPeerMgr {
     peers: Cache<PeerId, DnsPeerInfo>,
-    pub(super) dirty: DirtyState<DnsPeerMgrDirtyFlags>,
+    pub(super) dirty: DirtyState<DirtyFlag>,
 
     #[deref]
     mgr: Arc<PeerManager>,
@@ -92,7 +87,7 @@ impl DnsPeerMgr {
             }
         };
 
-        self.dirty.peers.mark();
+        self.dirty.mark();
 
         match self.fetch(peer_id).await {
             Ok(info) => {